Patent Number: 7,787,022

Title: Red-eye filter method and apparatus

Abstract: A digital image acquisition system having no photographic film, such as a digital camera, has a flash unit for providing illumination during image capture and a red-eye filter for detecting a region within a captured image indicative of a red-eye phenomenon, the detection being based upon a comparison of the captured image and a reference image of nominally the same scene taken without flash. In the embodiment the reference image is a preview image of lower pixel resolution than the captured image, the filter matching the pixel resolutions of the captured and reference images by up-sampling the preview image and/or sub-sampling the captured image. The filter also aligns at least portions of the captured image and reference image prior to comparison to allow for, e.g. movement in the subject.

Inventors: Steinberg; Eran (San Francisco, CA), Prilutsky; Yury (San Mateo, CA), Corcoran; Peter (Galway, IE), Bigioi; Petronel (Galway, IE), DeLuca; Michael J (Boca Raton, FL)

Assignee: FotoNation Vision Limited

International Classification: H04N 5/228 (20060101); H04N 5/262 (20060101)

Expiration Date: 8/31/12018